I don't remember the name of it, I think it was a Win32 application though.
It could be played in like 30 mins. But was quite the game. It was in 3D, and was a space sim.
You basically were flying around this area of space, just before this invasion, I think. So it was just a few dog fights, and then a "destroy the capital" ship ending.
You could "warp" from sector to sector, when ever the scripted attacks began. Basically you pressed a key, then selected the area on a map, then flew through this green, winding tunnel thing for a few secs.
You could also "dock" at these stations, which were looked like a big donut. You had to fly up the centre to "dock", then get repairs and replenish ammo.
Me and my brother use to play it always way back. I used the game pad to pilot and shoot. And he was beside me with the key board as the "opperations officer". Switching weapons, warping in an outta systems, bringing up the map, setting docking sequences.
Good times, good times